US Patent 7815102 Inputting device for refrigerator

An inputting device for a refrigerator, comprises: a display having one or more button regions; and an optical sensor for sensing the button region selected by a user according to whether optical signals have been shielded; and a controller for receiving a signal indicating the sensed state from the optical sensor thereby controlling an operation of a refrigerator. Since the optical sensor for sensing the button region selected by a user is provided, an operation error is reduced. Furthermore, since the optical sensor has a low cost, a fabrication cost is reduced.